House Extensions | Design in the making

In Covent Garden, a listed building gets a bold new rooftop silhouette

Remodelling a former merchant's house's upper floors, Carmody Groarke put living space at the top and added an aluminium pavilion

Hayhurst & Co’s Norfolk bungalow revamp has star quality

Architect Nick Hayhurst’s North Sea East Wood transforms a 1980s Norfolk bungalow

How should architects approach extending a listed building?

Three outstanding extensions to Grade II-listed houses provide design inspiration and practical insights for architects looking to extend heritage buildings.

Timber-framed extension to Grade II-listed house 'pulls the outside in'

For a south London home extension, ROAR resisted the temptation to mirror the existing architecture and opted for sustainable materials

The tall clerestory windows, fitted furniture and the courtyard provide visual and spatial relief to the living and dining space.

Terrace extension creates a home office with a 'birdhide' feel

Ambacht's living, dining and working space maximises light and provides views onto trees and sky

Green tile-clad garden studio provides a versatile space for a growing family

Delve Architects’ multi-use space accommodates painting, yoga, reading and sleeping

Large curved opening distinguishes extension to listed Victorian house

Dominic McKenzie Architects’ extension combines Scandinavian modernism with references to the existing building

Pensaer’s Defoe Road house extension emphasises efficient rearrangement

The revitalisation of a Victorian terraced house prioritises repositioning spaces over adding a large extension

Verdant House’s striking extension embraces natural materials

CAN’s extension features an open-plan kitchen that spills into the garden through a curved window

Metal-clad extension to Victorian house belongs to Scottish agricultural tradition

Studio KAP’s addition to a house in Argyll creates visual links with its striking rural setting

Hackney Victorian house extension lets the light flow through

Architecture for London’s extension creates a sense of rhythm through its use of brick

Nordic and Japanese traditions influence Edwardian house extension

A three-volume full-width rear extension is influenced by Nordic and Japanese traditions

Pavilion provides crafted endpoint for Stoke Newington garden

N4 Architecture’s Birch Pavilion provides a space for work, relaxation and listening to music

House extensions: thinking beyond the box

Reinventing the home: how to change lives as well as buildings

Basket-weave stone brickwork animates the facade of Hackney house extension

Draper Studio’s addition to a mid-terrace Victorian house pioneers the domestic use of limestone brick product

Minty House brings quirkiness and colour to north London street

Peter Morris Architects’ house extension and refurbishment taps into childhood memories of play

Wimbledon extension develops modern equivalent to traditional brick homes

Matthew Giles Architects extended and remodelled a dilapidated Edwardian house

Local Art Deco informs garden granny annex

Uxbridge Bower by Bureau de Change enables intergenerational living

Curved ﬂoor-to-ceiling glazing brings modern touch to Highgate arts and crafts house

Liddicoat & Goldhill has added a large basement and sinuous garden room to a 1917 house

Robin Lee Architecture extends arts and crafts villa in Hampshire conservation area

The Avenue combines a contextually sensitive side extension and a glazed rear extension

Offroad vehicle inspires Fabric's geometric glass, zinc and aluminium extension

Shared ambition drives 'out of the ordinary' design

Yellow frieze marks out rear extension to Victorian east London house

Archmongers has updated a Victorian house in Dalston into a high-tech modern home featuring a new rear extension

Sussex cottage extension improves functionality while respecting historic charm

HAPA Architects has added modern design elements while retaining the cottage’s historic charm

Gianni Botsford’s Hampstead house complements Foster-designed extension

Reciprocal House complements a Foster-designed extension while replacing the original Victorian coach house

Civic’s glazed garden room uses the sun to heat and trees to shade

Civic co-founder Dan Jones on the ground-floor extension designed for his own family home

Transforming a mundane 20-year-old house into a modern Edwardian villa

Gundry + Ducker’s refurbishment and extension includes an entirely new facade that references the area’s older buildings

Extension to home in Norwich conservation area pays homage to traditional corbelling

Grafted’s debut project celebrates the original detailing of a house in Norwich’s Golden Triangle

Cantilevered terrace marks out Gillespie Yunnie’s extension to house on Dartmoor

Gillespie Yunnie adds a dynamic first-floor extension to a 20th-century house in Ashburton, Devon

Artefact adds a series of Caribbean-inspired living spaces to Surrey house

Artefact on its new wing for a detached home in Epsom that spurns open-plan living spaces

[Y/N] Studio prioritises nuance with its glass extension for a Victorian home

Attention to detail maintains individualism and intimacy in conservation-driven project

HAPA Architects restores grade II-listed home with sympathetic flint-faced extension

Conservation area sees new addition share materials palette of original house

Studio KAP adds metal-clad extension to Victorian villa in Glasgow

The frame-like character complements the solid presence of the existing sandstone building

Andre Kong Studio creates stepped brick loft to expand London house

The distinct brick loft is expressed as a series of three stepped volumes hosting a bedroom, study and bathroom

Delve Architects combines sawtooth roofed extension with 60s-style interiors

Groovy Roofy uses circular economy principles while meeting the clients’ wish for a playful 60s colour scheme

Artefact revamps and extends former council house in Islington

Pirouette House combines open-plan living with niches for individual activities

Selencky Parsons’ Old Apple Store addition doubles original footprint

The new structure’s form and material palette refer to those of the existing house in a contemporary way

District's canny, colourful extension wraps around ground floor flat

Colour Casing project in south east London provides flexible, light-filled spaces to the side and rear

Envelop's green-roofed volumes and reflections push the boundaries for back extensions in Hackney

Stainless steel panels and an oriel window set up a subtle intimacy between house and garden

Fieldwork's brick ribbon extension wraps up a bigger, better family home

Garden, facades and internal plan come together to make Fieldworks Architects' coherent home

Hollaway Studio’s weathered steel extension complements 18th-century Kent house

Upper Maxted uses rust-coloured steel to blend with its rural context

Coloured cement sets the tone at EBBA’s Cast House

Eco-cement and brick form the rough base for the upper level's material refinement

Larch-clad volume extends barn home into Bristol’s green belt

How Mitchell Eley Gould extended a house on green belt land to add a new kitchen and living area

Vernacular tiles front Bureau de Change’s unconventional extension

This unusually shaped rear extension to a north London semi accommodates a sunken living room

KAST Architects’ home conversion restores life to Cornish barns

How KAST made a light and airy home at Milk Moon Barn

Williams Griffiths upholds modernist ethos in Ferrings estate extension

Sympathetic addition to original home makes seamless extension

Cool for cats: how Emil Eve’s extension made a light, relaxed home

Long light and warm wood invite calm lingering

Gresford Architects extends and remodels Walthamstow house

Reorganising the layout made the terraced house better suited to modern family life, says Tom Gresford

Common Ground Workshop creates hidden oasis in end-of-terrace house

How a modest east London property was extended into Spitalfields House, merging interior and exterior spaces

AOC wraps a forest-inspired extension around a north-east London home

Gill Lambert and Geoff Shearcroft on adapting their Victorian semi to meet the needs of a family of five

Invisible Studio creates house extension for filmmaker and playwright

Piers Taylor talks about extending a Hampshire cottage to reconfigure the space and maximise the view

Sinclair Studios' addition introduces a lofty glasshouse feel

Glazed side return extension in verdant green steel brings light, life and lushness to a Clapham terrace

Rear elevation.

Grace Choi Architecture turns darkness into light with reinvented Newcastle home

Timber loggia creates connections and a delightful place to pause

James Alder takes a layered approach to Victorian extension

Brick and glass outbuildings inspire garden flat addition

Guttfield Architecture gives modernist makeover to 1960s brick box house

Practice director Fred Guttfield talks about transforming Weir Grove House in Berkshire